FIBS in Archaeobotany: Functional Interpretation of Weed Floras in Relation to Husbandry Practices

The application of “FIBS” (Functional Interpretation of Botanical Surveys) to the interpretation of archaeobotanical weed floras, as evidence of past husbandry practices, is explored. To illustrate the potential of the approach, present-day cereal fields in N. Spain are analysed in terms of the functional attributes of the weed species represented in dry-farmed and irrigated fields. Functional attributes are identified which relate in predictable ways to the quality of plant growth and the severity of drought. These attributes are successful in discriminating dry-farmed and irrigated fields. This investigation opens up the way for more general application of the method in the archaeobotanical study of crop husbandry. FIBS (a) permits the “translation” of ecological information from one group of species to another, via functional attributes, and (b) through an understanding of the ecological processes involved, provides a potential mechanism for reconstructing extinct agricultural regimes for which modern analogues do not exist. This presents an alternative to the traditional use of ecological indices (which are open to circularity of interpretation) or phytosociological groupings (for which there may not have been exact parallels in the past). The relevance of particular functional attributes to husbandry methods other than irrigation now needs to be explored in order to develop the methodology for general application to archaeobotanical weed assemblages.     

From Traditional Farming in Morocco to Early Urban Agroecology in Northern Mesopotamia: Combining Present-day Arable Weed Surveys and Crop Isotope Analysis to Reconstruct Past Agrosystems in (Semi-)arid Regions

ABSTRACT

We integrate functional weed ecology with crop stable carbon and nitrogen isotope analysis to assess their combined potential for inferring arable land management practices in (semi-)arid regions from archaeobotanical assemblages. Weed and GIS survey of 60 cereal and pulse fields in Morocco are combined with crop sampling for stable isotope analysis to frame assessment of agricultural labour intensity in terms of manuring, irrigation, tillage and hand-weeding. Under low management intensity weed variation primarily reflects geographical differences, whereas under high management intensity fields in disparate regions have similar weed flora. Manured and irrigated oasis barley fields are clearly discriminated from less intensively manured rain-fed barley terraces in southern Morocco; when fields in northern and southern Morocco are considered together, climatic differences are superimposed on the agronomic intensity gradient. Barley δ¹³C and δ¹⁵N values clearly distinguish among the Moroccan regimes. An integrated approach combines crop isotope values with weed ecological discrimination of low- and high-intensity regimes across multiple studies (in southern Morocco and southern Europe). Analysis of archaeobotanical samples from EBA Tell Brak, Syria suggests that this early city was sustained through extensive (low-intensity, large-scale) cereal farming.     

On the Archaeobotanical Inference of Crop Sowing Time using the FIBS Method

Phytosociological data on weed communities associated with autumn- and spring-sown crops in Germany are subjected to correspondence analysis and, in addition to a primary separation of communities on acidic and basic soils, the two sowing regimes are clearly distinguished in terms of phytosociological character species. In order to facilitate the archaeobotanical recognition of autumn versus spring sowing on the basis of weed seeds associated with ancient crop remains, an autecological method of analysis called FIBS (Functional Interpretation of Botanical Surveys) is applied to the phytosociological data. Functional attributes relating to seasonality and/or the capacity to regenerate rapidly following disturbance are found to be the best ecological indicators of sowing time; of these, onset and length of the flowering period are the most useful attributes of all. Attributes which relate to the quality of the growth period, which usually indicate soil fertility, are apparently influenced by sowing time in this study. The implication is that, in applying functional attributes to archaeobotanical data, sowing time should be assessed prior to fertility.     

Agricultural change in Copper Age Croatia (ca. 4500–2500 cal B.C)?

The Copper Age in the Carpathian Basin is marked by a distinct change in settlement patterns, material culture, social traditions and subsistence practices; however, few studies address the nature of crop cultivation in the region. This paper examines new archaeobotanical data from 13 Copper Age (ca. 4500–2500 cal BC) sites located in continental Croatia, in order to assess the extent to which crop agriculture may have changed and contributed to overall subsistence economies in the Copper Age. From the archaeobotanical results, a dominance in einkorn and emmer is seen followed by barley. Less frequently millet, naked wheat and spelt/new glume wheat are also recovered, but due to their limited numbers, it is less clear whether they were grown as crops or represent weeds. Pulses (e.g. lentil, pea and grass pea), fruit remains (e.g. cornelian cherry and chinese lantern) and wild plant and weed species are also recovered, although more commonly from the late Copper Age sites. The archaeobotanical results show a clear reduction in the quantity and range of plant species recovered during the early/middle Copper Age; however, this is likely the result of taphonomic bias rather than a reduction in crop cultivation. The results therefore highlight problems of recovery bias in the region, which makes comparisons between sites as well as the reconstruction of crop husbandry regimes difficult. Overall, the results from continental Croatia suggest that the type of crops cultivated continued relatively unchanged from the late Neolithic, although it is clear that more research is desperately needed to explore the relationship between crop agriculture and the changing socio-economic environment of the Copper Age in the region.     

A statistical approach to the archaeological identification of crop processing

Since the processing of crops has a direct effect on the composition of archaeobotanical samples, variation due to crop processing must be filtered out before using samples for the study of crop economy and husbandry. As the archaeological context of plant material does not often provide a reliable basis for the identification of crop processing products and byproducts, this paper presents a method based on the statistical comparison of archaeological samples with ethnographically collected material and on an internal statistical analysis of the archaeological samples themselves. These analyses make use of differences in the categories of weed seeds extracted at each stage of the crop processing sequence and are thus more reliable and more widely applicable than simple calculations of the relative quantities of grain, chaff and weed. Ethnographic and archaeological material from Greece is used to illustrate the method and some of the wider implications of the results are discussed.     

Changes in crop cultivation during the last five centuries before the Roman conquest: archaeobotanical investigation in the Clermont-Ferrand basin,Massif Central,France

For several decades, a growing number of protohistoric sites in Auvergne (Massif Central, France)—mostly excavated through preventive archaeology—have been subject to the collection of archaeobotanical analysis. This study presents the archaeobotanical results from ten La Tène sites dating from the last five centuries before the Roman conquest. In addition to providing an inventory of taxa, this paper concerns crops and crop cultivation methods. These results are interpreted in a wider context, dealing with crop husbandry, arable farming, storage and consumption practices. The sites are located in the Limagne plain within a 50-km radius around the city of Clermont-Ferrand. A total of 23,579 carpological remains were identified from 163 sediment samples totalizing a volume of 1096 l. Comparable to other sites in Gaul, the spectrum of cereals and pulses is restricted. Spelt (Triticum spelta), einkorn (Triticum monococcum) and foxtail millet (Setaria italica) are disappearing or becoming rare. A better control of agricultural techniques and increased yields is supposed during the ca. five centuries of the La Tène period. Mixed cultivation is hereby replaced by the sowing of monocrops. At the beginning of this period, farming systems are dominated by a polyculture of cereals and pulses. They become more specialized during the last two centuries before the Roman conquest; diversity of cereals and pulses is decreased.     

Variety in cereal cultivation in the Late Bronze and Early Iron Ages in relation to environmental conditions

The objective of this paper is to assess the relationship between the cereals cultivated in the Late Bronze and Early Iron Ages (ca. 1250–400 BC) within the area of the present-day Czech Republic, and their environmental settings. The various charred caryopses of cereal species represented in the archaeobotanical assemblages from 35 archaeological sites differ, especially in the proportion of wheat and barley. The cereal assemblages were compared regarding site altitude, weather conditions, soils and soil productivity. The most important environmental variable influencing the choice of a particular crop seemed to be altitude which is correlated with other variables such as the length of growing season, mean annual temperature, soil quality etc. Although the ecological requirements of cereals cultivated in the Late Bronze and Early Iron Ages are not known, they presumably thrived under similar conditions to present-day species/varieties, and the strategy of past crop husbandry was based on similar principles as today, e.g. flexible adaptation to local environmental conditions, in an effort to achieve optimal yields and reduce the danger of crop failure.     

Manuring and stable nitrogen isotope ratios in cereals and pulses: towards a new archaeobotanical approach to the inference of land use and dietary practices

This paper explores the impact of animal manure application on the δ¹⁵N values of a broad range of crops (cereals and pulses), under a range of manuring levels/regimes and at a series of locations extending from northwest Europe to the eastern Mediterranean. We included both agricultural field experiments and areas where ‘traditional’ farming is practised. Our aim is to ground-truth interpretation of δ¹⁵N values in archaeobotanical crop remains as evidence of past growing conditions and husbandry practices. The results confirm the potentially radical impact of manuring on δ¹⁵N values in cereals, depending on manuring level, but indicate only a slight effect on pulses, which can fix atmospheric nitrogen. The expected geographical trend towards greater δ¹⁵N with increasing climatic aridity is not apparent, probably because the growing conditions for crops are ‘buffered’ through crop management. Each of these observations has fundamental implications for archaeobotanical interpretation of δ¹⁵N values as evidence of land use practices and (together with analysis of bone collagen/tooth enamel in potential consumers) palaeodiet.     

Bread and surpluses: the Anglo-Saxon ‘bread wheat thesis’ reconsidered

This paper presents a fundamental new assessment of crop husbandry in the Mid Saxon period in England (c. AD 650–850), using data from charred plant remains. While recent archaeological studies have begun to emphasise the importance of agricultural development in this period – focusing especially upon field systems and livestock – crops have received comparatively little attention. This study challenges one popular model of Anglo-Saxon arable farming, here dubbed the ‘bread wheat thesis’, which posits a Mid Saxon shift whereby bread wheat supplanted hulled barley as the most important cereal crop in this period. The empirical basis for this model is here re-examined in the light of an updated archaeobotanical dataset from selected regions in southern Britain. No evidence for bread wheat supplanting hulled barley is discovered. It is argued instead that rye and oats became substantially more important in the 7th–9th centuries, regional patterns in cereal cultivation in this period correlate with differences in the natural environment and Anglo-Saxon farmers were able to produce greater arable surpluses from the 7th century onwards.     

High-Altitude Agro-Pastoralism in the Kyrgyz Tien Shan: New Excavations of the Chap Farmstead (1065–825 cal b.c.)

ABSTRACT

The highlands of Central Asia posed considerable challenges to early agriculturalists, yet the processes of human subsistence strategies there remain poorly understood. In this paper, we present results from the excavation of the Chap in Kyrgyzstan. The recovery of a rich macrobotanical assemblage consisting of several crop species and crop processing debris, together with skeletal remains of pastoral livestock, indicate a localized agro-pastoral complex at 2000 masl dating to 1065–825 cal b.c. Aerial photogrammetry, magnetometry, and topographic modeling reveal local irrigation systems, while stone artifacts are linked with cultivation and crop processing. Furthermore, the ceramic assemblage reveals a local production tradition and stylistic similarities with communities of neighboring regions. Overall, data from Chap contribute to a new understanding of human ecology and agricultural development in the mountains of Central Asia, suggesting that domesticated plants and animals were integral for the intensive occupation of high-elevation valleys in Central Asia.     

Environmental change,agricultural innovation,and the spread of cotton agriculture in the Old World

Recent excavations at the site of Kara-tepe in northwestern Uzbekistan revealed evidence for the production of cotton (Gossypium sp.) in domestic contexts dated to ca. 300–500 AD. These archaeobotanical remains help to document the spread of Old World cotton production, and predate the existing evidence for its cultivation in Central Asia. The context in which these remains were found—in temperate Eurasia at a time of intense environmental and social change—suggests that the spread of cotton agriculture to this region occurred when new plant varieties were incorporated into domestic production regimes as part of local adaptive strategies. The development and transmission of cotton as a global cultigen was initiated by these small-scale innovations aimed at the expansion of economically and environmentally sustainable subsistence practices in Central Asia. Subsequent worldwide transmission occurred when emerging empires helped to spread cotton agriculture more widely across the Old World.     

Integrated archaeobotanical analysis: Human impact at the Dutch Neolithic wetland site the Hazendonk

This study presents an integrated archaeobotanical analysis of human impact at the Dutch Neolithic wetland site the Hazendonk (4000–1800 cal BC). The analysis included pollen, non-pollen palynomorphs and macroremains from on-site sample columns and macroremains and wood from refuse layers. The various remains provide evidence of disturbance of both dryland and wetland vegetation, information on crop cultivation and food plants, and indications of selection of wood for artefacts. The integrated approach provides results that would not have been obtained by the analysis of one of the sources alone.     

Alternative adaptive regimes for integrating foraging and farming activities

There are two distinct forager-farmer adaptive regimes evidenced in the ethnographic record: an ancillary and surplus cultivation regime. Societies characterized by these different regimes define different systems for allocating time to the production of domesticated plants. Cross-cultural patterns support the proposition that two socioecological conditions are logically necessary in order for an ancillary cultivation regime to develop and persist within a population of foragers. Wild resources must be sufficiently available, and farmers who produce a surplus of crops must be available to exchange with, live with or raid to redistribute crops after an episode of crop loss. The cross-cultural presence of two empirically distinct regimes for integrating foraging and farming is a useful frame of reference for evaluating how prehistoric foragers first integrated foraging and farming activities in archaeological contexts of secondary crop acquisition. A preliminary examination indicates that the ethnographic patterns are most consistent with the interpretation that the earliest farmers to inhabit the American Southwest produced at least a minimal surplus of domesticated plants. It is postulated that the adoption of a surplus cultivation regime by a population creates the adaptive opportunity for ancillary cultivation to develop and persist on a landscape.     

The Preservation and Interpretation of δ34S Values in Charred Archaeobotanical Remains

The measurement of sulphur isotope (δ³⁴S) values in charred plant remains has the potential to inform understanding of the spatial configuration and ecology of crop production. We investigated the effects of charring, manuring, oxidation and anaerobic soil conditions on modern cereal grain/pulse seed δ³⁴S values, and assessed the effect of chemical pre‐treatment on charred modern and archaeobotanical grain/seed δ³⁴S values. We used these results to interpret δ³⁴S values in archaeobotanical material from Neolithic Çatalhöyük. Our results suggest that δ³⁴S values can be reliably preserved in charred grain/seeds but are subject to influence by anaerobic soil conditions, the effect depending on the timing of flooding in relation to S assimilation.     

Intensive Agricultural Landscapes of Oceania

Pacific Islanders have adapted over time to a wide range of social and environmental conditions. Subsistence regimes include broad-based fishing and gathering along with horticulture, particularly the cultivation of staple tubers. Agricultural ecosystems on many islands manifest elaborate expressions of greater inputs of labor or the necessity to overcome agronomic constraints to production. Landscapes of intensive agriculture once found throughout Oceania include yam mounds, raised fields, and irrigated terracing. Most of these systems are either abandoned or greatly diminished in scale. Findings from research in the Fiji Islands exemplify some of the forms and functions of these landscapes. Field study at an active system of irrigated terraces for growing taro (Colocasia esculenta) on the remote southern island of Kadavu elucidates the dynamic operations of a gardening strategy that was once much more prevalent throughout the archipelago. Changing political economies across the region may have radically altered humanenvironment relations, but intensive agricultural landscapes endure, providing visible evidence and imparting valuable lessons for traditional cultural ecology in Oceania.     

Towards a distinction between digested and undigested glume bases in the archaeobotanical record from Neolithic northern Greece: A preliminary experimental investigation

Abstract

This study investigates the possibility of distinguishing digested from undigested glume wheat chaff in the archaeobotanical record. To this end the contents of dung pellets collected from a goat fed on einkorn spikelet forks and glume bases are analysed and the derived einkorn chaff examined macroscopically with the aid of scanning electron microscopy. The modern dung pellets contained recognisable glume bases which, compared with undigested ones, demonstrated a ‘rugged’ surface. When these dung pellets were charred, glume bases were still preserved in them. The experimental pellets show that dung can contribute glume bases in archaeobotanical assemblages and that these glume bases may be distinguishable from those derived from glume wheat dehusking by-products used as fuel. These results need to be further explored on archaeobotanical materials. Moreover, further experimentation with different charring regimes, as well as the examination of more experimental specimens is needed.     

Reconstructing subsistence at the Yingpanshan and Gaoshan sites in Sichuan province,China: Insights from isotope analysis on bone samples and charred crop remains

During the Neolithic period, the Chengdu Plain was a key region where two important crops, rice and millet, were cultivated together. Millet was probably introduced from north-western China c.3500–3300 cal. bce , and rice came from the Middle Yangtze River c.2600 cal. bce . In this study, human and faunal remains, as well as charred crop grains, were collected from the Yingpanshan (3300–2600 cal. bce ) and Gaoshan (2500–2000 cal. bce ) sites where the dominant crop was millet and rice, respectively. Carbon and nitrogen isotope analyses were conducted on human bones and the ecofact samples in order to reconstruct the subsistence at the sites. The results indicate that the diets of two individuals recovered from the Yingpanshan site consisted of both C₃- and C₄-based foods, predominantly the former. By contrast, Yingpanshan pigs consumed a large quantity of C₄ fodder. This result, combined with the ecofact evidence, suggests that millet was the main crop at the Yingpanshan site. It also highlights the fact that the two Yingpanshan individuals might be non-locals and/or belonged to later periods. On the other hand, the diet of the Gaoshan community was dominated by C₃-based foods. When considering the archaeobotanical evidence at Baodun, a site contemporaneous with and near to the Gaoshan site, it can be stated that rice was an important food resource for the Gaoshan community. This study also suggests how crops were managed at the two sites. The Yingpanshan people might have used manure for growing millet. Both manuring and irrigation might have also been practised by Gaoshan's rice farmers. However, more studies are required to understand the extent of manuring and irrigation in their agricultural economies.     

Archaeobotanical investigation of two Scythian-Sarmatian period pits in eastern Ukraine: Implications for floodplain cereal cultivation

Abstract

Two Scythian-Sarmatian period pits dated to the 5th–1st centuries b.c. were discovered while excavating the Chalcolithic site of Zanovskoe, located on a floodplain of the Donets River in the steppe region of eastern Ukraine, Lugansk oblast. No contemporaneous settlement sites are known in the region. Archaeobotanical analysis was conducted on charred plant macrofossils recovered from pits at the site. The crop assemblage consisted of hulled barley and broomcorn millet, from which AMS radiocarbon dates were obtained. Other identified plant species mostly constituted arable weeds and wetland plants. The archaeobotanical assemblage implies floodplain cereal cultivation strategies among the steppe inhabitants during this period.     

河南地区新石器时代生业方式初探

本文通过梳理河南地区动植物考古研究成果,对新石器时代(距今10000年—4000年)河南地区豫北、郑洛和豫西南三个区域的生业方式进行了初步的综合研究和探讨。研究表明,新石器时代中期河南地区是以采集渔猎为主、种植农作物和饲养家畜为辅的生业模式,经过新石器时代晚期的过渡,发展为以种植农作物和饲养家畜为主、采集渔猎为辅的生业模式;新石器时代末期,农作物中新加入了大豆和小麦,家畜中新加入了黄牛和绵羊,多种农作物种植和家畜饲养方式逐渐形成。人类对动植物资源的掌控、文化和资源的交流是生业发展的主因,同时自然环境对生业起到了制约和促进两方面的影响。在古代社会发展与文明进步的进程中,生业起到了不可或缺的重要作用。     

Carrot (Daucus carota L.) in Medieval Kraków (S. Poland): a cultivated form?

A large quantity of what appear to be processed fruits of Daucus carota L. were found in Rynek G?ówny (the main market square) in Kraków in a medieval organic layer dated to the 14th century AD. The fruits possess only slight traces of spiny secondary ridges, a characteristic feature of fruits used for sowing. Comparative measurements of the fruit dimensions also show them to be significantly different to other finds of D. carota in medieval Kraków. This therefore is perhaps the first archaeobotanical evidence indicating the cultivation of carrot in medieval Poland. Unprocessed carrot fruits, wild and cultivated forms being indistinguishable, are found in Europe from the Neolithic period onwards.